20367440

素因数分解:

$2^4\times 5^1\times {\mathrm{254593}}^1$

素因数の和:254606

約数の個数: 20

約数和(自身を含む): 47354484

約数和(自身を除く): 26987044

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 254593, 509186, 1018372, 1272965, 2036744, 2545930, 4073488, 5091860, 10183720, 20367440]

約数ペア:

[(1, 20367440), (2, 10183720), (4, 5091860), (5, 4073488), (8, 2545930), (10, 2036744), (16, 1272965), (20, 1018372), (40, 509186), (80, 254593)]